A Study of Brentuximab Vedotin and CHP in Frontline Treatment of PTCL With Less Than 10% CD30 Expression

Inclusion Criteria

* Newly diagnosed PTCL, excluding systemic anaplastic large cell lymphoma (sALCL), per the Revised European-American Lymphoma World Health Organization (WHO) 2016 classification
* The following non-sALCL PTCL subtypes are eligible:

* PTCL - not otherwise specified (PTCL-NOS)
* Angioimmunoblastic T-cell lymphoma (AITL)
* Adult T-cell leukemia/lymphoma (ATLL; acute and lymphoma types only, must be positive for human T cell leukemia virus 1)
* Enteropathy-associated T-cell lymphoma (EATL)
* Hepatosplenic T-cell lymphoma
* Monomorphic epitheliotropic intestinal T-cell lymphoma (MEITCL)
* Indolent T-cell lymphoproliferative disorder (T-LPD) of the gastrointestinal (GI) tract
* Follicular T-cell lymphoma
* Nodal peripheral T-cell lymphoma with T-follicular helper (TFH) phenotype
* CD30 expression \<10% by local assessment in tumor containing lymph node or other extranodal soft tissue biopsy
* Fluorodeoxyglucose (FDG)-avid disease by PET and measurable disease of at least 1.5 cm by CT, as assessed by the site radiologist
* An Eastern Cooperative Oncology Group (ECOG) performance status less than or equal to 2

Exclusion Criteria

* Current diagnosis of any of the following:

* sALCL
* Primary cutaneous T-cell lymphoproliferative disorders and lymphomas
* Mycosis fungoides (MF), including transformed MF
* History of another primary invasive cancer, hematologic malignancy, or myelodysplastic syndrome that has not been in remission for at least 3 years. Exceptions are malignancies with a negligible risk of metastasis or death (e.g., 5-year OS ≥90%), such as carcinoma in situ of the cervix, non-melanoma skin carcinoma, localized prostate cancer, ductal carcinoma in situ, or Stage I uterine cancer.
* History of progressive multifocal leukoencephalopathy (PML).
* Cerebral/meningeal disease related to the underlying malignancy.
* Prior treatment with brentuximab vedotin or doxorubicin.
* Baseline peripheral neuropathy Grade 2 or higher (per the NCI CTCAE, Version 4.03) or subjects with the demyelinating form of Charcot-Marie-Tooth syndrome.
* Left ventricular ejection fraction less than 45% or symptomatic cardiac disease (including symptomatic ventricular dysfunction, symptomatic coronary artery disease, and symptomatic arrhythmias), or myocardial infarction within the past 6 months, or previous treatment with complete cumulative dose of \>300 mg/m2 of doxorubicin.
* Any uncontrolled Grade 3 or higher (per the National Cancer Institute's Common Terminology Criteria for Adverse Events, NCI CTCAE Version 4.03) viral, bacterial, or fungal infection within 2 weeks prior to the first dose of study drug. Routine antimicrobial prophylaxis is permitted.